Aquasana Shower Filter (AQ-4100)

Checked against its certification listings: what they cover, what the maker claims, and what it costs over five years.

Shower

Listings checked Oct. 16, 2026

Certified to

Not on any listing

NSF, WQA, IAPMO, checked Oct. 16, 2026. Every claim on this page is the maker’s alone.

Maker’s list price

$140

as of Oct. 16, 2026

Each replacement, at list price

Shower filter replacement cartridge (AQ-4125): $63

Five years, 40 gallons of showers a day

$707

1.0¢ per gallon

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Price on Amazon The maker’s page

List price from the maker’s site, checked Oct. 16, 2026. Prices change; the maker’s page is the final word.

No certification found

Not on any listingNSF, WQA, IAPMO, checked Oct. 16, 2026

TapBuff searched the certifiers’ own listings and found nothing for this product. That does not mean it does not work. It means no independent certifier has confirmed what it reduces, so every claim below is the maker’s alone.

Certified for, and claimed

Certified, by a listing

Nothing.

Claimed by the maker only

chlorine

Certification claims we could not find on a listing

Aquasana says the shower filter is "independently tested to NSF/ANSI Standard 177" to reduce over 90% of chlorine. No listing for it was found at NSF, WQA or IAPMO on Oct. 16, 2026.

What it costs over five years

40 gallons of showers a day, EPA WaterSense’s figure for the average family, all through this one shower. Installation not included.

Item	Replaced	Count	Amount
System, with first media	—	1	$140
Shower filter replacement cartridge (AQ-4125)	Every 6 monthsmonth rating	9	$567

Five-year total$707

Per gallon1.0¢

Run it for your household

Worth knowing

No certification found. The product page also lists the 78 contaminants Aquasana’s Claryum drinking water filters reduce; the shower filter’s own claim is chlorine. Prices are the $139.99 and $62.99 list prices, with the standard showerhead; Aquasana showed both lower with its Water for Life plan.

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